Allee effects, immigration, and the evolution of species' niches.
D000220:Adaptation, Biological; D000483:Alleles; D000818:Animals; D005075:Biological Evolution; D004777:Environment; D014644:Genetic Variation; D008957:Models, Genetic; D011157:Population Dynamics; D040641:Quantitative Trait Loci; D012641:Selection, Genetic; D012744:Sex Ratio